Elevating mechanism of heavy guns.



A T DAWSON an. H 0RNE. ELEVATING MECHANISM OF-HEAVY GUNS.

" APPLICATION FILED MAY-15.1915- Pat ented Jan. 21, 1919.

2 SHEETS-SHEET I.

A. T. DAWSON & J. HORNE. ELEVATING MECHANISM OF HEAVY GUNS.

APPLICATION FILED MAY 15. I915. 1,291,775, Patented Jan. 21,1919.

2 SHEETS-SHEET 2.

I anzmapbm London,

UNITED STATES ARTHUR rnnvon Dawson,

BARROW-IN-FUBNESS,- ENGLAND, ASSIGNORS TO VICKERS LIMITED, OF

WESTMINSTER, LONDON, ENGLAND.

ELEVATING- MECHANISM OF HEAVY GUNS.

Specification of Letters Patent. Patented J an. 21,1919.

Application filed May 15, 1915. Serial m. 28,495.

To all wlwm it may concern:

c it lmown that we, Sir ARTHUR Tnnvon DAWSON, Knight, and JAMES HORNE,both subjects of the King of Great Britain, re-

at Vickers House, Westminster, in the county of England, and NavalConstruction Works, Barrow-in-Furness, in the county of Lancaster,England, have invented cersidmg, respectively, Broadway,

'tain new and useful Improvements in or Relating to the ElevatingMechanism of Heavy Guns, specification.

This invention relates to elevating mechanism of the kind in which twohydraulic presses or cylinders are employed, the ends of therams orpiston rods of these presses being preferably attached to a slipperconnected by links to the elevating bracket or of which the following isa trunnion arm.

According to this invention we provide means whereby the presses can beoperated either by liquid under pressure obtained from the hydraulicmains or by liquid supplied by a variable delivery pump, without itsbeing necessary to drain the presses or cylinders in' cha ging from onesystem to the other.

In order that the said invention may be :learly understood and readilycarried into effect we will describe the same more fully with referenceto the accompanying drawng, which is a sectional side elevation showngin a more or less diagrammatic manner L constructional form of theinvention.

A, A are the two elevating presses and a, a are their rams or pistonrods. B is he slipper to which the rams or piston rods re attached, andb is one of the links conlecting the slipper to the elevating bracket rtrunnion arm B. C represents the conrol valve of the hydraulic systemand D epresents the variable delivery pump riven by an electric motorD".

In the example shown the clylinders A, A re 'oppositel arranged and teir inner ends re connectedby. pipes a, a", to the control alve C whilethe outer ends are connected y pipes d, d"; to the variable delivery umpD. V The pipe a has a stoprvalve a ad the pipe 01* has alsimilar" valve02 lese two -pipes are connected through an- ;her stop valve A. Forpurposes of disnction we term the last mentioned valve the main stopvalve and the other two stop .valves the secondary stop valves. A sim1-lar arrangement of main and secondary stop valves D, d d) is arrangedbetween the pipes (Z, d and between the variable delivery pump and thecylinders. When the hydraulic system of elevating is employed, the mainstop valve A 1s closed and the secondary sto valves d d appertaining tothe variab e delivery pump are also closed, the other valves remainingopen; the liquid (usually oil) in the outer ends of the cylinders A, A"is therefore caused to pass from one cylinder to the other duringthe'hydraulic elevation of the gun. Gonversely when pressure fluid fromthe variable delivery pump D is to be employed for elevating the gun,the main stop valve D appertaming to this pump is closed and thesecondary valves appertaining to the by draulic system are also closed(the other valves remaining open) so that the fluid in the inner ends ofthe cylinders is caused to pass from one cylinder to the other duringthe elevation ofthe gun by the pressure fluid supplied by'the pump D.

It is to be understood that any other suitable arrangement of stopvalves for obtalnring the above mentioned results may be employed.

What we claim and desire to secure by Letters Patent of the UnitedStates is 1. In the elevating mechanism of ordnance, the combination'with'two pressure fluid elevating presses, of a variable, delivery pumpadapted to supply fluid under pressure to said presses, a pressure fluidmain also adapted to supply fluid under pressure to said presses andmeans whereby pressure fluid obtained from elther of said sources can beused for operating said presses without its being necessary to emptythem of the liquid obtained from the other source.

2. In the elevating mechanism of ordnance, the combination withtwopressure fluid elevating cylinders and their plston rods, of a variabledehvery pump adapted to supply fluid under pressure to' each of saidcyhnders, a pressure fluid main also adapted to supply fluid underpressure to each of said cylinders and means whereby pressure fluidobtained from either of sald supplies can be used for operating saidmston rods without its being necessary to empty the cylinders of theressure fluid obtained from the other supp y.

3. .In the elevating mechanism of ordnance, the combination with twopressure fluid elevating cylinders and theirv piston rods, of a var'abledelivery pump adapted to supply flui ,under pressure to and to exhaustthe fluid from one end of each of said cylinders, a pressure fluid mainand an exhausflmain adapted to supply fluid vun 'der pressure to and toexhaust the fluid from the other end of each cylinder, and

stop valves for opening communications between one of said pair ofcylinder ends and closing communication between them and the source ofsupply when the other pair.

of cylinder ends is in use.

4. In the elevating mechanism of ordnance, the combination with theelevating bracket of the gun and two hydraulic presses operating uponsaid elevating bracket of a. variable delivery pump adapt- I ed tosupply liquid under pressure to saidpresses, a hydraulic main alsoadapted to supply fluid under pressure to said resses and means wherebliquid obtaine from either of said supplies can be used for operati'ngsaid plresses without its being necessary to empty t em of the liquidobtained from the other supply.

-of a variable delivery pump adapted to supply liquid under pressure toeach of said cylinders, a hydraulic main alsp adapted to supply liquidunder pressure to each cylinder and means whereby liquid obtained fromeither of said supplies can be used for operating said piston rodswithout its being necessary to empty the cylinders of the liquidobtained from the other supplyaxtl 7'. In the elevating mechanism. ofordnance, the combination with theelevating bracket of the un and twooppositely arranged hydraufic cylinders whose piston rods operate uponsaid elevatin bracket, of a variable delivery. pump a .apted to supplyliquid under pressure to' and to exhaust the liquid from one end of eachof said cylind exhaust ma' adapted to supply-liquid under pressure toand to exhaust the liquid from the other end of each cylinder and stopvalves for opening communication tween one of said pair of cylinder endsand closing communication between them and the source of supply whenthe'other pair of cylinder ends is m use.

In testimony whereof we atfix dur signatures.

ARTHUR TREVORDAWSON'. JAMES HORNE.

a hydraulic main and an bev

